I got a Secret Jardin DS80 to m8, a great buy. You will need to have the fan on at all times the light is on, as I had my fan off for 15 mins and 2 babies a week old ended up bent over to the ground with the heat.(I have 400W HPS). As for a carbon filter, it is a must during flowering, without it the smell (however lovely) will travel for great distances once blown out by the fan.(Heavy jail-bait). Hanging your filter on the straps and bar provided, next to or above your light works perfect.
Make sure to kill that odor as that is the purpose of the Secret Jardin range, to keep your business a secret and not having grasses and snitches, ex partners or jelouse cunts, or even just the neighbours, know what your doing coz they smell it, next thing you know 5 O are burstin through your door.
Good luck.
I have just started 3 white widow last week and sprouting some big bang just now, I would be interested in following your grow if you upload pics, to see the difference between your light set up and my 400W HPS when using one of these dark rooms as apossed to growing in a closet as I previosly did.